Portfolio Construction
How real portfolios are built, sized, and rebalanced — with the math that makes each decision matter.
Most investing content focuses on stock-picking. The portfolio is treated as an afterthought: pick the right stocks and the rest takes care of itself. The empirical evidence runs the other way. Position sizing, diversification, rebalancing cadence, and concentration discipline determine more of long-run portfolio outcomes than any individual stock-pick decision does.
This cluster covers the construction side. How a real portfolio gets built. How concentration is calibrated. How rebalancing converts variance into return. How diversification beyond a certain point starts to hurt. Read top-to-bottom for a complete framework, or jump to the article that addresses your immediate question.
Recommended reading order
5 articles, ordered for sequential learning. Skim by title if you already know the basics.
- 1What Is a Model Portfolio? A Plain-English Guide
What model portfolios actually are, how they differ from funds, and why publishing one matters for retail investors.
Read → - 2Concentration vs. Diversification: When 20 Stocks Is Plenty
The math of diversification, where it stops adding value, and why concentrated portfolios are how the great investors actually got rich.
Read → - 3Portfolio Diversification: How Much Is Enough?
Detailed math on how many stocks reduce risk meaningfully and the diminishing returns past 25-30 names.
Read → - 4Quarterly Rebalancing: Why It Beats Set-and-Forget
Why rebalancing on a schedule converts portfolio drift into return and keeps the original strategy working.
Read → - 5What Is Rebalancing? (And Why It Quietly Beats the Market)
How rebalancing forces the sell-high-buy-low discipline most investors fail to enforce on their own.
Read →
Market Masters
The market masters model portfolio applies the methodology this topic covers. 17.6% CAGR over the backtest, +5.1% alpha vs the S&P 500.
Explore Market Masters→The Market Normality Report
Where today’s S&P 500 sits in 75 years of history. Twelve brand-designed pages. Print-ready. Free.
Get the report →